package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.R;
import com.itheima.dao.DishDao;
import com.itheima.dto.DishDto;
import com.itheima.pojo.Dish;
import com.itheima.pojo.DishFlavor;
import com.itheima.service.DishFlavorService;
import com.itheima.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class DishServiceImpl extends ServiceImpl<DishDao, Dish> implements DishService {
    /**
     * 新增菜品
     */
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private RedisTemplate redisTemplate;

    @Override
    public R<String> saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);
        //获取菜品id
        Long dishId = dishDto.getId();
        //获取菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味数据到菜品口味表中
        dishFlavorService.saveBatch(flavors);

        //保存菜品口味到redis缓存中
        String key = "dish_"+dishDto.getCategoryId();
        redisTemplate.delete(key);
        return R.success("添加菜品成功");
    }

    /**
     * 根据id查找数据 回显数据
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(long id) {
        //查询菜品基本信息 从dish表查询
        Dish dish = this.getById(id);
        DishDto dishDto = new DishDto();
        //信息拷贝
        BeanUtils.copyProperties(dish,dishDto);
        //查询当前菜品对应的口味信息,从dish_flavor表中查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);
        return dishDto;
    }

    /**
     * 修改菜品数据
     * @param dishDto
     */
    @Transactional
    @Override
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);
        //清理当前菜品对应口味数据   dish_flavor 表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());
        dishFlavorService.remove(queryWrapper);


        //添加当前提交的口味数据  dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item)->{
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());
    }
}
